TID Sensitivity Assessment of Quadrature LC-Tank VCOs Implemented in 65-nm CMOS Technology. Karmakar, A., De Smedt, V., & Leroux, P. Electronics, 11(9):1399, January, 2022. Number: 9 Publisher: Multidisciplinary Digital Publishing Institute![TID Sensitivity Assessment of Quadrature LC-Tank VCOs Implemented in 65-nm CMOS Technology [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex This article presents a comprehensive assessment of the ionizing radiation induced effects on the performance of quadrature phase LC-tank based voltage-controlled-oscillators (VCOs). Two different quadrature VCOs (QVCOs) that are capable of generating frequencies in the range of 2.5 GHz to 2.9 GHz are implemented in a commercial 65 nm bulk CMOS technology to target for harsh radiation environments like space applications and high-energy physics (HEP) experiments. Each of the QVCOs consumes 13 mW power from a 1.2 V supply. The architectures are based on the popular implementation of two different types of QVCOs: parallel-coupled QVCO (PQVCO) and super-harmonic coupled QVCO (SQVCO). The various performance metrics (oscillation frequency, quadrature phase, phase noise, frequency tuning range, and power consumption) of the two different QVCOs are evaluated with respect to a Total ionizing Dose (TID) up to a level of approximately 100 Mrad (SiO2) through X-ray irradiation. During irradiation, the electrical characterization of the samples of the prototype are performed under biased condition at room temperature. Before irradiation, the QVCOs (PQVCO and SQVCO) achieve phase noise equal to −115 dBc/Hz and −119 dBc/Hz at 1 MHz offset, resulting in figure-of-merit (FoM) of −172.2 dBc/Hz and −176.4 dBc/Hz respectively. The test-setup of the TID experiment is discussed and the results obtained are statistically analyzed in this article to perform a comparative study of the performance of the two different QVCOs and evaluate the effectiveness of the radiation hardened by design techniques (RHBDs) employed in the implementations. Post-irradiation, the overall variations of the frequencies of the oscillators are less than 1% and the change in tuning range (TR) is less than 5% as observed from the tested samples.
@article{karmakar_tid_2022,
title = {{TID} {Sensitivity} {Assessment} of {Quadrature} {LC}-{Tank} {VCOs} {Implemented} in 65-nm {CMOS} {Technology}},
volume = {11},
copyright = {http://creativecommons.org/licenses/by/3.0/},
issn = {2079-9292},
url = {https://www.mdpi.com/2079-9292/11/9/1399},
doi = {10.3390/electronics11091399},
abstract = {This article presents a comprehensive assessment of the ionizing radiation induced effects on the performance of quadrature phase LC-tank based voltage-controlled-oscillators (VCOs). Two different quadrature VCOs (QVCOs) that are capable of generating frequencies in the range of 2.5 GHz to 2.9 GHz are implemented in a commercial 65 nm bulk CMOS technology to target for harsh radiation environments like space applications and high-energy physics (HEP) experiments. Each of the QVCOs consumes 13 mW power from a 1.2 V supply. The architectures are based on the popular implementation of two different types of QVCOs: parallel-coupled QVCO (PQVCO) and super-harmonic coupled QVCO (SQVCO). The various performance metrics (oscillation frequency, quadrature phase, phase noise, frequency tuning range, and power consumption) of the two different QVCOs are evaluated with respect to a Total ionizing Dose (TID) up to a level of approximately 100 Mrad (SiO2) through X-ray irradiation. During irradiation, the electrical characterization of the samples of the prototype are performed under biased condition at room temperature. Before irradiation, the QVCOs (PQVCO and SQVCO) achieve phase noise equal to −115 dBc/Hz and −119 dBc/Hz at 1 MHz offset, resulting in figure-of-merit (FoM) of −172.2 dBc/Hz and −176.4 dBc/Hz respectively. The test-setup of the TID experiment is discussed and the results obtained are statistically analyzed in this article to perform a comparative study of the performance of the two different QVCOs and evaluate the effectiveness of the radiation hardened by design techniques (RHBDs) employed in the implementations. Post-irradiation, the overall variations of the frequencies of the oscillators are less than 1\% and the change in tuning range (TR) is less than 5\% as observed from the tested samples.},
language = {en},
number = {9},
urldate = {2022-12-30},
journal = {Electronics},
author = {Karmakar, Arijit and De Smedt, Valentijn and Leroux, Paul},
month = jan,
year = {2022},
note = {Number: 9
Publisher: Multidisciplinary Digital Publishing Institute},
keywords = {LC-tank, Q-phase, QVCO, SEE, TID, VCO, X-ray, high energy physics, quadrature, radiation, radiation hardened by design, super-harmonic},
pages = {1399},
}
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